Feature:1. SUITABLE FOR: For C8 C8HD C925 C11HD, for Sky Rover 80ED 102ED 130APO and for 100ED Binoculars, also compatible with for Sharpstar, for SkyWatcher Other Models.2. UNIQUE DESIGN: Equipped with two large thumbscrew locks. Includes two M4 screws. Ensures a slippy surface and precise track cutting, perfect for your telescope.3. WIDE COMPATIBILITY: Perfect for custom mounting any viewfinder, EZ viewfinder reflex sight and green laser pointer mount on any telescope.4. EASY TO USE: dovetail base fits finder scope or reflector mounts so you can securely attach the sighting device to any telescope.5. DURABLE MATERIAL: Made of premium aluminum alloy, sturdy and durable. With it, you can attach a telescope star guide mirror to your telescope.Specification:Item Type: Dovetail BaseMaterial: Aluminum AlloyUpper Edge: 23.4mmCenter Edge: 34mmSlot Edge: 9.5mmLower Edge: 34mmCross Hole Width: 5mmCross Hole Can Be Fixed: M3M5 ScrewsUsage: for C8 C8HD C925 C11HD, for Sky Rover 80ED 102ED 130APO and for 100ED Binoculars, Can Also Be Mounted On for Sharpstar, for SkyWatcher Other Models..Package List:1 x Dovetail Base1 x Wrench2 x Screw